Maine Stoneworkers Guild: http://mainestoneworkersguild.org/
 
The Maine Granite Industry Historical Society: http://mainegraniteindustry.org/
 
Schoodic International Sculpture Symposium: http://schoodicsculpture.org
 
The Sullivan–Sorrento Historical Society of Maine: http://sullivansorrentohistory.org/
 
The Granites of Maine (1907), Author: Dale, Thomas Nelson, 1845–1937:
http://archive.org/details/granitesmaine00dalegoog

Sullivan Granite Co. donates material for Sandy Hook Memorial: http://bangordailynews.com/2013/02/08/news/down-east/memorial-crafted-in-cutler-to-be-maines-gift-to-sandy-hook/

(About the sculpture and artist: http://schoodicsculpture.org/symposia/symposium-2007/2007-artists/jo-kley/)